Floor-clamping device.



I. LAURI.

FLOOR GLAMPING DEVICE. APPLIOATION FILED MAY 12, 1913.

1,094,449, Patented Apr. 28,1914:

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" ELOOR-CLAMPING DEVICE.

resents;

Specification of Letters Patent.

Patented Apr. 28, 1914:.

Application filed May 12.1913. Serial 1\ To.-767,125.-

T 0 (IZZ whom it may concern;

Be it known that 1, Isaac LAURI, a citrzen ofthe United States, andresiding at Flcddwood, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Floor- Clamping Devices, of which the'following is a specification.

TEL-e invention relates 'to new and useful improvements in floor clampingdevices, and moreparticularly to that class used by building mechanics.

An object of device of this-character which when applied to a supporting beam of a flooring or the like, will retain the boards to be secured thereto in position until the mechanic has securely fastened the same. v A further object of this invention is to improve and simplify devices of this character, rendering them reliable and efficient in use, simple andinexpensive to manufacture, and readily operated.

A still further object of this invention is to supply a floor clamping device with a locking means in the form of a removable handle, which can be readily removed from the device after the same is in its desired position, thus locking the device substantially in position, until the handle is again applied.

With the above and other; objects in view this invention resides. in the novel features of construction, formations, combinations and arrangements of parts to be hereinafter more fully, described, claimed and illustrated in the. accompanying drawings in which a Figure 1, is a top plan View of my dev ce aaplied to a floor, Fig. 2, is a side elevat1on oythe. same, Fig. 3, is a perspective of my device removed from the flooring and, Fig. 4, is a fragmentary longitudinal sectional View of the same. I

Referring to the accompanying drawings by characters'of reference, the numeral designates generally portion of a flooring,

comprising the customary boards 11 and supporting beams 12, upon which my device 13 is secured and; operated.

The device 13 consists of a tubular casing 1st having formed in its center and running transverse of the casing, four suitably spaced apertures lt for the reception of a removlength of the casing runs a threaded bore 29.

The threads of this bore starting from opposite ends and terminating in advance of the.

this invention is to provide a transverse apertures 14L These threads be ing left hand and right hand threads to correspondwith .those formed upon the threaded rods 16 and 17 in order so that when the device 18 being operated both rods 16 and 17 will feed into or out of the threaded bore in opposite directions.- The rods16' and 1'? are 01 the same thickness, but both terminate 'difierently, the rod 17 having formed at one end an enlarged plate portion 18 having an aperture 19 formed in the center thereof through which passes a threaded key 21 which has a pointed end formed thereon whichpenetrates the supporting beam 12' of thefiooringw when the said key 21 is turned, and the device is in operation, while the plate portion 18 of the rod 17 terminates into a forked end 22 having two pointed endsformed thereon for a similar purpose to that of the pointed key 21. The rod 16 terminates into a swivel head 23 which operates in a socket 2st formed in an extension .25 secured by any suitable-means to a block 26, which also has secured to its outer face 27 a rubber pad 28 to protect the device when in operation from disfiguring the con tacting edges of the flooring.

It should be understood inthis connection that various minor changes in the details of construction, can be resorted to within the scope of the appended claims, withfrom or sacrificing any of the out departing advantages of the invention.

'The operation of my device is as fol lows:The clainp is set upon the beam and the fork havin two sharp points formed thereon immed'ately penetrates into the sup vporting beam which in most cases is made of soft wood such as pineor the like. The handle is then grasped and the operator turns the same until the rubber pad contacts with the edges of the boards forming the flooring. then the operator tightens down on the threaded key which immediately sinks its pointed end into the supporting beam, and

produced avery substantial backing for the device to work on. The operator then con-' .tinues to operate the handle until the desired results are obtained, and to remove the device hejust reverses the operation, and the clamp is' free, and ready to be taken apart and packed away if's'o des red. 1 From the foregoing disclosure, 1t Wlll be incombination with the pointed fork there is manifestthat a floor clamping device of the" characterdescribed is provided, which can What I claim as new and desire to protect by Letters Patent is 1. 111 a clamp, a tubular casing having transverse apertures and a threaded bore formed therein, rods operating in't-he said hore a block secured to one of the rods, :1

plate terminating into a fork having an aperture formed therein and formed upon the other rod, a pointed key operating in the said aperture and a removable handle as operating means for the device.

' 2. In a clamp, a tubular casing having transverse apertures and a threaded bore.

formed therein, rods operating in the threaded bore, a block secured to one of the rods, a pad secured to the block, a plate having a threaded aperture formed therein and ter- [urinating into a fork and formed upen the other red, a pointed key operating in the said aperture, and a removable handle as operating means for the device.

' 5.111 a clamp, a tubular casing having transverse apertures formed therein, and a bore consisting of left and right hand threads. reds perating in the said bore and. h ing' corresponding threads formed thereon. a rod terminating into a suivel head. a block ception of the said Swivel head. a plate ten ininating into a .tork having an aperture formedtherein and formed upon another rod, and a removable handle as operating means for the device.

In testimony vvhereof I aflix my signature in presence of two Witnesses.

' ISAAC L URI.

vWitnesses E. B. ROBINSON, C. A. Roerrsox.

having va socket formed therein for the re-' 

